Metaled-end concrete pipe



C. MERIWETHER.

METALED END CONCRETE PIPE.

APPLICATION FILED DEC-13. 1919.

Patented Nov. 8, 1921.

gvwewtoz Coleman Ple riwefher;

; mic (Mew dial dimension UNITED STATES "PATENT OFFICE.

REILLY, OF INDIANAPOLIS,

INDIANA.

-METALED-END CONCRETE PIPE.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application filed December 13, 1919. Serial No. 344,613.

To all whom z't'mag concern Be it known that I, COLEMAN Mann WETHER, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Metaled-End Concrete Pipe, of which the following is a specification.

The object of my invention is to produce an efficient reinforced concrete pipe construction, having metallic sealing contacts end to end, of suchform that a fluid-tight connection may be made and maintained, the construction being such that the metal parts forming the special feature of my invention, may be cheaply produced and used without the exercise of special skill.

The accompanying drawings illustrate my invention. Figure 1 is a side elevation, in partial vertical section, of pipe, embodying my invention; Fig. 2 a fra mentary axial sec ion, on a larger scale; an Fig. 3 a fragmentary transverse section on the same scale as Fig. 1.

In the drawings, 10 indicates a metal ring formed so as to produce two internal shoulders or shelves 11 and 12 and an outwardlyextending circumferential flange 13 at its outerend. Flange 13 is at various points perforated, as indicated at 14, closely adjacent the main body of the ring, for the reception of bolts 15, the shanks of the bolts passing loosely through each perforationl i, and the heads of the bolts lying in the crotch between the main body of the ring and the flange 13 in such manner as to be held against turning. Flange 13 has an outward extent slightly less than the desired ultimate diame ter of the pipe which is to be formed by the embedding concrete 16 which embeds the ring 10 and the heads of the bolts 15, as clearly shown in Fig. 2. If the concrete is to be reinforced, the inner may be provided with suitable perforations 17, into which the longitudinal reinforcing members 18 may be passed.

The thickness of the embedding concrete 16 is considerably greater than the total raof the ring 10 and embeds the annular shoulder 11 which is outwardly presented, relative to the length of the pipe, so that, as the concrete shrinks, it will be drawn tightly against the shoulder 11, so that leakage will be prevented at this point.

The spigot end of each pipe is formed by a metal ring 20 having an external diameter,

of a series of lengths end of ring 10.

at its outer end, such that it may fit easily within the main body of ring 10. Ring 20 is provided on its interior, near its outer end, with an inwardly-projecting annular flange 21 and is provided externally near its inner end with an outwardly projecting annular flange 22, the arrangement being such that when the ring is embedded in concrete, the concrete will, in shrinking, shrink tightly against the surfaces 21 and 22, so as to insure against leakage.

The embedding concrete 16 adjacent ring 20, leaves a major portion of this ring externally free so that a space is formed for the manipulation of packing members now to be described.

vWhen the pipes have been brought together end to end with the outer end of rin 20 lying within the main body of ring 10 o the adjacent pipe, a ring of packing, conveniently lead pipe 25, is placed around ring 20 in the space formed by shoulder 12 and the adjacent portion of ring 10. A rigid ring 26, which has been previously slipped over the ring 20, is then moved into engagement with pi e 25 and a pressure toe 27 slipped over eac bolt 15, said pressure toe at its outer end resting upon flange 13 and at its inner end resting upon ring 26. A nut 28 is then screwed .upon each bolt 15, said nut engaging the curved outer face of the pressure toe and serving to drive ring 26 firmly into place so as to distort the packing ring 25 and produce a tight metallic joint between the two pipes. The outer surface of the pressure toe is curved both laterally and longitudinally so that nut 28 may easily cooperate therewith. The inner end of ring 20 may be perforated as indicated at 30 for the reception of the longitudinal reinforcing members 18.

When nuts 28 have been firmly screwed 1 into place and a tight joint produced, the gap between the adjacent ends of the embedding concrete 16 is filled by concrete 16, which serves to embed all of the exposed parts.

It will be noted that by passing the bolts 15 outwardly through perforations 14 of flange 13. and by having the heads of the bolts contact with the main body of the ring, no machining of the ring is required for the reception of the bolts and the bolts become firmly embedded in the concrete, yet at the same time no stress exerted by the nuts 28 a the clamping bolts,

will be transmitted to the concrete, because all tendency of turning of the bolt 15 will be resisted by the main body of ring 10. This is important because if it were proposed to thread the openings 14 for the reception of it is apparent not only that the flange 13 would have to be considerably heavier in order to furnish adequate thread length, but also that these threaded openings would have to be protected in some way during the embedment of the rings 10 in concrete 16 in order to prevent the concrete from entering the threads and thus rpventing proper reception of the clamping 0 ts.

I claim as my invention:

1. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, an internally projecting outwardly presented shoulder against which the concrete may shrink, clamping bolts projected outwardly through said flange with their heads held against rotation by contact with the bell and embedded in the concrete, a metal spigot embedded in the concrete and formed to project into the spigot-receiving portion of an adjacent bell, said spigot having internal and external annular ribs presenting surfaces against which the concrete will shrink to prevent leakage, a metal packing engaging ring arranged around the spigot end adjacent the packing receiving surface, and pressure means coiiperating with said bolts and ring, said pressure means comprising an individual pressure toe for gach bolt, said toe having a curved outer ace.

2. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an en flange, an internally projecting outwardly presented shoulder against which the concrete may shrink, clamping bolts projected outwardly through said flange with their heads held against rotation by contact with the bell and embedded in the concrete, a metal spigot embedded in the concrete and formed to projectinto the spigot-receiving portion of an adjacent bell, said spigot having internal and external annular ribs presenting surfaces against which the concrete will shrink to prevent leakage, a metal packing engaging ring arranged around the spigot end adjacent the packing receiving surface, and pressure means coiiperating with said bolts and ring.

3. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, clamping bolts projected outwardly through said flange with their heads held against rotation by contact with the bell and embedded in the concrete, a metal spigot embedded in the concrete and formed to project into the spigot-receiving portion of an adjacent bellr as metal packing engaging ring arranged around the spigot end adjacent the packing receiving surface, and pressure means cooperating with said bolts and ring.

4. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, an internally projecting outwardlypresented shoulder against which the concrete may shrink, clamping bolts projected outwardly through said flange with their heads held against rotation by contact with the bell and embedded in the concrete, a metal spigot embedded in the concrete and formed to project into thespigot receiving portion of an adjacent bell, said spigot having internal andexternal annular ribs presenting surfaces against which the concrete will shrink to prevent leakage, a metal packing engaging ring arranged around the spigot end adjacent the packing receiving surface, and pressure means cotiperating with said bolts and ring, said pressure means comprising an individual pressure toe for each bolt.

5. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, clamping bolts projected outwardly through said flange with their heads held against rotation by contact with the bell and embedded in the'concrete, a metal spigot embedded in the concrete and formed to project into the spigot-receiving portion of an adjacent bell, a metal packing engaging ring arranged around the spigot end adjacent the packing surface, pressure means coiiperating with said bolts and ring, said pressure means comprising an individual pressuretoe for each bolt.

6. A concrete pipe structure comprising an embedded metal bell having a packing receiving shoulder, a plurality of bolts projected outwardly through longitudinal perforations in said bell with their heads contacting with the bell to prevent rotation of the bolts, a packing engaging ring arranged adjacent the packing receiving shoulder, pressure means coiiperating with said ring and bolts, said pressure means comprising a plurality of individual pressure toes one for each bolt, and having a curved outer face, and nuts threaded upon said bolts and engagirig said pressure means.

7. concrete pipe structure comprising an embedded metal bell having a packing receivingv shoulder, a plurality of bolts projected outwardly through longitudinal perforations in said bell with their heads contacting withthe bell to prevent rotation of the bolts, a packing engaging ring arranged adjacent the packing receiving shoulder, pressure means coiiperating with said ring and bolts,

plurality an embedded metal bell having a packing receiving shoulder,

a plurality of bolts projected outwardly through longitudinal perforations in said bell with their heads contacting with the bell to prevent rotation of the bolts, a packing engaging ring arranged adjacent the packing receiving shoulder, pressure means cooperating with said ring and bolts, and nuts threaded upon said bolts and engaging said pressure means.

In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, clamping bolts projected outwardly through said flange with their heads embedded in the concrete, a metal spigot embedded in the concrete and formed to project into-the spigot-receiving portion of an adjacent bell, and a metal packing engaging ring arranged around the spigot end adjacent the packing receiving surface and arranged to be clamped against the packing by the action of said bolts.

10. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, an internally projecting outwardly presented shoulder against which the concrete may shrink, a metal spigot embedded in-the concrete and formed to project into the spigot-receiving portion of an adjacent bell, said spigot having internal and external annular ribs presenting surfaces against which the concrete will shrink to prevent leakage, a metal packing engaging ring arranged around the spigotend ad acent the packing receiving surface, and pressure means cooperating with said end flange and r1ng.

11. In a concrete pipe, an embedded metal bell having a spigot receiving portion, an adjacent packing receiving shoulder, an end flange, an internally projecting outwardly presented shoulder against which the con- .both internally and externally,

crete may shrink, a metal spigot embedded in the concrete and formed .to project into the spigot-receiving portion of an adjacent bell, said spigot having an annular rib presenting surfaces against which the concrete will shrinkto prevent leakage, a metal pack- -1ng engaging ring arranged around the spigot end adjacent the packing receiving surface, and pressure means cooperating with said end flange and ring.

' 12. In a concrete pipe joint, two cooperating pipe ends, one comprising an annular metal spigot and embedding concrete covering the inner surface of said spigot and embedding the inner end of the spigot both internally and externally while leaving the outer end of the spigot exposed externally, and the other comprising an annular metal spigot-receiving bell and embedding concrete embedding the inner end of said bell both internally and externally, each of said metal parts being provided with an annular shoulder presented toward the end of the pipe and embedded in the concrete to provide an annular surface against which the concrete may shrink to avoid leakage.

13. In a concrete pipe joint, two cooperating pipe ends, one comprising an annular metal spigot and embeddlngconcrete covering the inner surface of said spigot and embedding the inner end of the spigot both internally and externally while leaving the outer end of the spigot exposed externally, and the other comprising anrannular metal spigot-receiving bell and embedding concrete embedding the inner end of said bell each of said metal parts being provided on its internal surface with an annular shoulder presented toward the end of the pipe and embedded in the concrete to provide an annular surface against which the concrete may shrink to avoid leakage.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this fifth day of December, A. D. one thousand nine hundred and nineteen.

COLEMAN MERIWETHER. 

